diff --git a/java/java-tests/testSrc/com/intellij/openapi/roots/impl/DirectoryIndexTest.java b/java/java-tests/testSrc/com/intellij/openapi/roots/impl/DirectoryIndexTest.java
index 090106340027..625be9434700 100644
--- a/java/java-tests/testSrc/com/intellij/openapi/roots/impl/DirectoryIndexTest.java
+++ b/java/java-tests/testSrc/com/intellij/openapi/roots/impl/DirectoryIndexTest.java
@@ -160,7 +160,7 @@ public class DirectoryIndexTest extends IdeaTestCase {
         @Override
         public Collection<SyntheticLibrary> getAdditionalProjectLibraries(@NotNull Project project) {
           return myProject == project ? Collections.singletonList(
-            SyntheticLibrary.newFixedLibrary(null, Collections.singletonList(myLibAdditionalSrcDir))
+            SyntheticLibrary.newImmutableLibrary(null, Collections.singletonList(myLibAdditionalSrcDir))
           ) : Collections.emptyList();
         }
       }, getTestRootDisposable());
diff --git a/platform/projectModel-impl/src/com/intellij/openapi/roots/AdditionalLibraryRootsProvider.java b/platform/projectModel-impl/src/com/intellij/openapi/roots/AdditionalLibraryRootsProvider.java
index 4dec10b79fd5..98da9d370816 100644
--- a/platform/projectModel-impl/src/com/intellij/openapi/roots/AdditionalLibraryRootsProvider.java
+++ b/platform/projectModel-impl/src/com/intellij/openapi/roots/AdditionalLibraryRootsProvider.java
@@ -53,9 +53,12 @@ public abstract class AdditionalLibraryRootsProvider {
     if (roots.isEmpty()) {
       return Collections.emptyList();
     }
-    return Collections.singletonList(SyntheticLibrary.newFixedLibrary(null, roots));
+    return Collections.singletonList(SyntheticLibrary.newImmutableLibrary(null, roots));
   }
 
+  /**
+   * @deprecated use {@link #getAdditionalProjectLibraries(Project)} instead
+   */
   @SuppressWarnings("DeprecatedIsStillUsed")
   @NotNull
   public Collection<VirtualFile> getAdditionalProjectLibrarySourceRoots(@NotNull Project project) {
diff --git a/platform/projectModel-impl/src/com/intellij/openapi/roots/SyntheticLibrary.java b/platform/projectModel-impl/src/com/intellij/openapi/roots/SyntheticLibrary.java
index 43b8f98ae190..2d2605452478 100644
--- a/platform/projectModel-impl/src/com/intellij/openapi/roots/SyntheticLibrary.java
+++ b/platform/projectModel-impl/src/com/intellij/openapi/roots/SyntheticLibrary.java
@@ -53,7 +53,7 @@ public abstract class SyntheticLibrary {
   public abstract Collection<VirtualFile> getSourceRoots();
 
   @NotNull
-  public static SyntheticLibrary newFixedLibrary(@Nullable String name, @NotNull Collection<VirtualFile> sourceRoots) {
+  public static SyntheticLibrary newImmutableLibrary(@Nullable String name, @NotNull Collection<VirtualFile> sourceRoots) {
     return new SyntheticLibrary() {
       @Nullable
       @Override